package main

import (
	"fmt"
	"github.com/hpcloud/tail"
	"time"
)

func main()  {
	filename := "./mg.log"
	tails, err := tail.TailFile(filename, tail.Config{
		ReOpen:    true,
		Follow:    true,
		//Location:  &tail.SeekInfo{Offset: 0, Whence: 2},
		MustExist: false,
		Poll:      true,
	})
	if err != nil {
		fmt.Println("tail file err:",err)
		return

	}
	var msg *tail.Line
	var ok bool

	for true {

		msg,ok = <- tails.Lines
		if !ok  {
			fmt.Println("tail file close reopen,filename:%s\n",tails.Filename)
			time.Sleep(100 * time.Millisecond)
			continue
		}
		fmt.Println("msg :",msg)
	}

}
